3. Key Brexit vote: The British Parliament is expected to vote on key legislation that will help pave the way for the U.K. to exit the European Union.

Prime Minister Theresa May is under tremendous pressure to get the bill passed.

4. Tarnished diamonds: Shares in mining firm Petra Diamonds dropped sharply in London after the company confirmed that a parcel of its diamonds had been blocked from export in Tanzania. Petra said that key personnel from its Williamson mine, which is 25% owned by the government, were being questioned by authorities.

The company's shares have recovered after a dramatic initial drop to trade roughly 10% below their Friday closing price.